The Legend of the Lost Keys

The Legend of the Lost Keys is an educational BBC Look and Read production, which first aired on BBC Two from 12 January to 23 March 1998, and was repeated on BBC Two until 2007. Whilst on holiday, twins, Mark and Lisa, discover that their Uncle George is the guardian of an ancient box, which is a gateway to the world of Heritron. When the box is stolen by scientists, George worries that the evil leaders of Heritron are trying to break through to Earth and it's up to the twins to help get the box back.